Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
19115 (1981 EM39)
Classification: Main-belt Asteroid          SPK-ID: 2019115
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09088455669512005 3.5456e-08  
a 2.29018103118267 8.0891e-09 au
q 2.08203894341206 7.8577e-08 au
i 5.27973576498205 4.7162e-06 deg
node 358.5181742348593 3.7372e-05 deg
peri 227.5741876084176 4.5485e-05 deg
M 123.6184167194621 2.612e-05 deg
tp 2458765.805822704941
(2019-Oct-09.30582270)
9.1648e-05 TDB
period 1265.910921520352
3.47
6.7069e-06
1.836e-08
d
yr
n .2843801991751853 1.5067e-09 deg/d
Q 2.498323118953279 8.8242e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1184  
   data-arc span      14555 days (39.85 yr)  
   first obs. used      1981-02-02  
   last obs. used      2020-12-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50806  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:41:32  

Additional Information
 Earth MOID = 1.07619 au 
 Jupiter MOID = 2.48631 au 
 T_jup = 3.588 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.52   n/a E2021B10  
diameter diameter 2.164 km 0.462 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.314   0.117 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19115 (1981 EM39)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-10 13:49 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin